/** * FreeRDP: A Remote Desktop Protocol Implementation * RDP Core * * Copyright 2011 Marc-Andre Moreau * Copyright 2014 DI (FH) Martin Haimberger * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include #include #include #include #include "rdp.h" #include "state.h" #include "info.h" #include "utils.h" #include "mcs.h" #include "redirection.h" #include #include #include #define TAG FREERDP_TAG("core.rdp") static const char* DATA_PDU_TYPE_STRINGS[80] = { "?", "?", /* 0x00 - 0x01 */ "Update", /* 0x02 */ "?", "?", "?", "?", "?", "?", "?", "?", /* 0x03 - 0x0A */ "?", "?", "?", "?", "?", "?", "?", "?", "?", /* 0x0B - 0x13 */ "Control", /* 0x14 */ "?", "?", "?", "?", "?", "?", /* 0x15 - 0x1A */ "Pointer", /* 0x1B */ "Input", /* 0x1C */ "?", "?", /* 0x1D - 0x1E */ "Synchronize", /* 0x1F */ "?", /* 0x20 */ "Refresh Rect", /* 0x21 */ "Play Sound", /* 0x22 */ "Suppress Output", /* 0x23 */ "Shutdown Request", /* 0x24 */ "Shutdown Denied", /* 0x25 */ "Save Session Info", /* 0x26 */ "Font List", /* 0x27 */ "Font Map", /* 0x28 */ "Set Keyboard Indicators", /* 0x29 */ "?", /* 0x2A */ "Bitmap Cache Persistent List", /* 0x2B */ "Bitmap Cache Error", /* 0x2C */ "Set Keyboard IME Status", /* 0x2D */ "Offscreen Cache Error", /* 0x2E */ "Set Error Info", /* 0x2F */ "Draw Nine Grid Error", /* 0x30 */ "Draw GDI+ Error", /* 0x31 */ "ARC Status", /* 0x32 */ "?", "?", "?", /* 0x33 - 0x35 */ "Status Info", /* 0x36 */ "Monitor Layout", /* 0x37 */ "FrameAcknowledge", "?", "?", /* 0x38 - 0x40 */ "?", "?", "?", "?", "?", "?" /* 0x41 - 0x46 */ }; const char* data_pdu_type_to_string(UINT8 type) { if (type >= ARRAYSIZE(DATA_PDU_TYPE_STRINGS)) return "???"; return DATA_PDU_TYPE_STRINGS[type]; } static BOOL rdp_read_flow_control_pdu(wStream* s, UINT16* type, UINT16* channel_id); static BOOL rdp_write_share_control_header(wStream* s, UINT16 length, UINT16 type, UINT16 channel_id); static BOOL rdp_write_share_data_header(wStream* s, UINT16 length, BYTE type, UINT32 share_id); /** * @brief Read RDP Security Header. * msdn{cc240579} * * @param s stream * @param flags security flags * * @return \b TRUE for success, \b FALSE otherwise */ BOOL rdp_read_security_header(wStream* s, UINT16* flags, UINT16* length) { char buffer[256] = { 0 }; WINPR_ASSERT(s); WINPR_ASSERT(flags); /* Basic Security Header */ if ((length && (*length < 4))) { WLog_WARN(TAG, "invalid security header length, have %" PRIu16 ", must be >= 4", *length); return FALSE; } if (!Stream_CheckAndLogRequiredLength(TAG, s, 4)) return FALSE; Stream_Read_UINT16(s, *flags); /* flags */ Stream_Seek(s, 2); /* flagsHi (unused) */ WLog_VRB(TAG, "%s", rdp_security_flag_string(*flags, buffer, sizeof(buffer))); if (length) *length -= 4; return TRUE; } /** * Write RDP Security Header. * msdn{cc240579} * @param s stream * @param flags security flags * * @return \b TRUE for success, \b FALSE otherwise */ BOOL rdp_write_security_header(wStream* s, UINT16 flags) { char buffer[256] = { 0 }; WINPR_ASSERT(s); if (!Stream_CheckAndLogRequiredCapacity(TAG, (s), 4)) return FALSE; WLog_VRB(TAG, "%s", rdp_security_flag_string(flags, buffer, sizeof(buffer))); /* Basic Security Header */ Stream_Write_UINT16(s, flags); /* flags */ Stream_Write_UINT16(s, 0); /* flagsHi (unused) */ return TRUE; } BOOL rdp_read_share_control_header(wStream* s, UINT16* tpktLength, UINT16* remainingLength, UINT16* type, UINT16* channel_id) { UINT16 len = 0; UINT16 tmp = 0; WINPR_ASSERT(s); WINPR_ASSERT(type); WINPR_ASSERT(channel_id); if (!Stream_CheckAndLogRequiredLength(TAG, s, 2)) return FALSE; /* Share Control Header */ Stream_Read_UINT16(s, len); /* totalLength */ /* If length is 0x8000 then we actually got a flow control PDU that we should ignore http://msdn.microsoft.com/en-us/library/cc240576.aspx */ if (len == 0x8000) { if (!rdp_read_flow_control_pdu(s, type, channel_id)) return FALSE; *channel_id = 0; if (tpktLength) *tpktLength = 8; /* Flow control PDU is 8 bytes */ if (remainingLength) *remainingLength = 0; return TRUE; } if (len < 4U) { WLog_ERR(TAG, "Invalid share control header, length is %" PRIu16 ", must be >4", len); return FALSE; } if (!Stream_CheckAndLogRequiredLength(TAG, s, len - 2)) return FALSE; if (tpktLength) *tpktLength = len; Stream_Read_UINT16(s, tmp); /* pduType */ *type = tmp & 0x0F; /* type is in the 4 least significant bits */ if (len > 5) { Stream_Read_UINT16(s, *channel_id); /* pduSource */ if (remainingLength) *remainingLength = len - 6; } else { *channel_id = 0; /* Windows XP can send such short DEACTIVATE_ALL PDUs. */ if (remainingLength) *remainingLength = len - 4; } return TRUE; } BOOL rdp_write_share_control_header(wStream* s, UINT16 length, UINT16 type, UINT16 channel_id) { WINPR_ASSERT(s); if (length < RDP_PACKET_HEADER_MAX_LENGTH) return FALSE; if (!Stream_CheckAndLogRequiredCapacity(TAG, (s), 6)) return FALSE; length -= RDP_PACKET_HEADER_MAX_LENGTH; /* Share Control Header */ Stream_Write_UINT16(s, length); /* totalLength */ Stream_Write_UINT16(s, type | 0x10); /* pduType */ Stream_Write_UINT16(s, channel_id); /* pduSource */ return TRUE; } BOOL rdp_read_share_data_header(wStream* s, UINT16* length, BYTE* type, UINT32* shareId, BYTE* compressedType, UINT16* compressedLength) { WINPR_ASSERT(s); if (!Stream_CheckAndLogRequiredLength(TAG, s, 12)) return FALSE; /* Share Data Header */ Stream_Read_UINT32(s, *shareId); /* shareId (4 bytes) */ Stream_Seek_UINT8(s); /* pad1 (1 byte) */ Stream_Seek_UINT8(s); /* streamId (1 byte) */ Stream_Read_UINT16(s, *length); /* uncompressedLength (2 bytes) */ Stream_Read_UINT8(s, *type); /* pduType2, Data PDU Type (1 byte) */ Stream_Read_UINT8(s, *compressedType); /* compressedType (1 byte) */ Stream_Read_UINT16(s, *compressedLength); /* compressedLength (2 bytes) */ return TRUE; } BOOL rdp_write_share_data_header(wStream* s, UINT16 length, BYTE type, UINT32 share_id) { const size_t headerLen = RDP_PACKET_HEADER_MAX_LENGTH + RDP_SHARE_CONTROL_HEADER_LENGTH + RDP_SHARE_DATA_HEADER_LENGTH; WINPR_ASSERT(s); if (length < headerLen) return FALSE; length -= headerLen; if (!Stream_CheckAndLogRequiredCapacity(TAG, (s), 12)) return FALSE; /* Share Data Header */ Stream_Write_UINT32(s, share_id); /* shareId (4 bytes) */ Stream_Write_UINT8(s, 0); /* pad1 (1 byte) */ Stream_Write_UINT8(s, STREAM_LOW); /* streamId (1 byte) */ Stream_Write_UINT16(s, length); /* uncompressedLength (2 bytes) */ Stream_Write_UINT8(s, type); /* pduType2, Data PDU Type (1 byte) */ Stream_Write_UINT8(s, 0); /* compressedType (1 byte) */ Stream_Write_UINT16(s, 0); /* compressedLength (2 bytes) */ return TRUE; } static BOOL rdp_security_stream_init(rdpRdp* rdp, wStream* s, BOOL sec_header) { WINPR_ASSERT(rdp); WINPR_ASSERT(s); if (rdp->do_crypt) { if (!Stream_SafeSeek(s, 12)) return FALSE; if (rdp->settings->EncryptionMethods == ENCRYPTION_METHOD_FIPS) { if (!Stream_SafeSeek(s, 4)) return FALSE; } rdp->sec_flags |= SEC_ENCRYPT; if (rdp->do_secure_checksum) rdp->sec_flags |= SEC_SECURE_CHECKSUM; } else if (rdp->sec_flags != 0 || sec_header) { if (!Stream_SafeSeek(s, 4)) return FALSE; } return TRUE; } wStream* rdp_send_stream_init(rdpRdp* rdp) { wStream* s; WINPR_ASSERT(rdp); WINPR_ASSERT(rdp->transport); s = transport_send_stream_init(rdp->transport, 4096); if (!s) return NULL; if (!Stream_SafeSeek(s, RDP_PACKET_HEADER_MAX_LENGTH)) goto fail; if (!rdp_security_stream_init(rdp, s, FALSE)) goto fail; return s; fail: Stream_Release(s); return NULL; } wStream* rdp_send_stream_pdu_init(rdpRdp* rdp) { wStream* s = rdp_send_stream_init(rdp); if (!s) return NULL; if (!Stream_SafeSeek(s, RDP_SHARE_CONTROL_HEADER_LENGTH)) goto fail; return s; fail: Stream_Release(s); return NULL; } wStream* rdp_data_pdu_init(rdpRdp* rdp) { wStream* s = rdp_send_stream_pdu_init(rdp); if (!s) return NULL; if (!Stream_SafeSeek(s, RDP_SHARE_DATA_HEADER_LENGTH)) goto fail; return s; fail: Stream_Release(s); return NULL; } BOOL rdp_set_error_info(rdpRdp* rdp, UINT32 errorInfo) { WINPR_ASSERT(rdp); rdp->errorInfo = errorInfo; if (rdp->errorInfo != ERRINFO_SUCCESS) { rdpContext* context = rdp->context; WINPR_ASSERT(context); rdp_print_errinfo(rdp->errorInfo); if (context) { freerdp_set_last_error_log(context, MAKE_FREERDP_ERROR(ERRINFO, errorInfo)); if (context->pubSub) { ErrorInfoEventArgs e = { 0 }; EventArgsInit(&e, "freerdp"); e.code = rdp->errorInfo; PubSub_OnErrorInfo(context->pubSub, context, &e); } } else WLog_ERR(TAG, "missing context=%p", context); } else { freerdp_set_last_error_log(rdp->context, FREERDP_ERROR_SUCCESS); } return TRUE; } wStream* rdp_message_channel_pdu_init(rdpRdp* rdp) { wStream* s; WINPR_ASSERT(rdp); s = transport_send_stream_init(rdp->transport, 4096); if (!s) return NULL; if (!Stream_SafeSeek(s, RDP_PACKET_HEADER_MAX_LENGTH)) goto fail; if (!rdp_security_stream_init(rdp, s, TRUE)) goto fail; return s; fail: Stream_Release(s); return NULL; } /** * Read an RDP packet header. * @param rdp rdp module * @param s stream * @param length RDP packet length * @param channelId channel id * * @return \b TRUE for success, \b FALSE otherwise */ BOOL rdp_read_header(rdpRdp* rdp, wStream* s, UINT16* length, UINT16* channelId) { BYTE li; BYTE byte; BYTE code; BYTE choice; UINT16 initiator; DomainMCSPDU MCSPDU; DomainMCSPDU domainMCSPDU; WINPR_ASSERT(rdp); WINPR_ASSERT(rdp->settings); WINPR_ASSERT(s); MCSPDU = (rdp->settings->ServerMode) ? DomainMCSPDU_SendDataRequest : DomainMCSPDU_SendDataIndication; *channelId = 0; /* Initialize in case of early abort */ if (!tpkt_read_header(s, length)) return FALSE; if (!tpdu_read_header(s, &code, &li, *length)) return FALSE; if (code != X224_TPDU_DATA) { if (code == X224_TPDU_DISCONNECT_REQUEST) { WLog_WARN(TAG, "Received X224_TPDU_DISCONNECT_REQUEST, terminating"); utils_abort_connect(rdp); return TRUE; } WLog_WARN(TAG, "Unexpected X224 TPDU type %s [%08" PRIx32 "] instead of %s", tpdu_type_to_string(code), code, tpdu_type_to_string(X224_TPDU_DATA)); return FALSE; } if (!per_read_choice(s, &choice)) return FALSE; domainMCSPDU = (DomainMCSPDU)(choice >> 2); if (domainMCSPDU != MCSPDU) { if (domainMCSPDU != DomainMCSPDU_DisconnectProviderUltimatum) { WLog_WARN(TAG, "Received %s instead of %s", mcs_domain_pdu_string(domainMCSPDU), mcs_domain_pdu_string(MCSPDU)); return FALSE; } } MCSPDU = domainMCSPDU; if (*length < 8U) { WLog_WARN(TAG, "TPDU invalid length, got %" PRIu16 ", expected at least 8", *length); return FALSE; } if (!Stream_CheckAndLogRequiredLength(TAG, s, *length - 8)) return FALSE; if (MCSPDU == DomainMCSPDU_DisconnectProviderUltimatum) { int reason = 0; TerminateEventArgs e = { 0 }; rdpContext* context; if (!mcs_recv_disconnect_provider_ultimatum(rdp->mcs, s, &reason)) return FALSE; context = rdp->context; context->disconnectUltimatum = reason; if (rdp->errorInfo == ERRINFO_SUCCESS) { /** * Some servers like Windows Server 2008 R2 do not send the error info pdu * when the user logs off like they should. Map DisconnectProviderUltimatum * to a ERRINFO_LOGOFF_BY_USER when the errinfo code is ERRINFO_SUCCESS. */ if (reason == Disconnect_Ultimatum_provider_initiated) rdp_set_error_info(rdp, ERRINFO_RPC_INITIATED_DISCONNECT); else if (reason == Disconnect_Ultimatum_user_requested) rdp_set_error_info(rdp, ERRINFO_LOGOFF_BY_USER); else rdp_set_error_info(rdp, ERRINFO_RPC_INITIATED_DISCONNECT); } WLog_DBG(TAG, "DisconnectProviderUltimatum: reason: %d", reason); utils_abort_connect(rdp); EventArgsInit(&e, "freerdp"); e.code = 0; PubSub_OnTerminate(rdp->pubSub, context, &e); return TRUE; } if (!Stream_CheckAndLogRequiredLength(TAG, s, 5)) return FALSE; if (!per_read_integer16(s, &initiator, MCS_BASE_CHANNEL_ID)) /* initiator (UserId) */ return FALSE; if (!per_read_integer16(s, channelId, 0)) /* channelId */ return FALSE; Stream_Read_UINT8(s, byte); /* dataPriority + Segmentation (0x70) */ if (!per_read_length(s, length)) /* userData (OCTET_STRING) */ return FALSE; if (!Stream_CheckAndLogRequiredLength(TAG, s, *length)) return FALSE; return TRUE; } /** * Write an RDP packet header. * @param rdp rdp module * @param s stream * @param length RDP packet length * @param channelId channel id * * @return \b TRUE for success, \b FALSE otherwise */ BOOL rdp_write_header(rdpRdp* rdp, wStream* s, UINT16 length, UINT16 channelId) { DomainMCSPDU MCSPDU; WINPR_ASSERT(rdp); WINPR_ASSERT(rdp->settings); WINPR_ASSERT(s); WINPR_ASSERT(length >= RDP_PACKET_HEADER_MAX_LENGTH); MCSPDU = (rdp->settings->ServerMode) ? DomainMCSPDU_SendDataIndication : DomainMCSPDU_SendDataRequest; if ((rdp->sec_flags & SEC_ENCRYPT) && (rdp->settings->EncryptionMethods == ENCRYPTION_METHOD_FIPS)) { const UINT16 body_length = length - RDP_PACKET_HEADER_MAX_LENGTH; const UINT16 pad = 8 - (body_length % 8); if (pad != 8) length += pad; } if (!mcs_write_domain_mcspdu_header(s, MCSPDU, length, 0)) return FALSE; if (!per_write_integer16(s, rdp->mcs->userId, MCS_BASE_CHANNEL_ID)) /* initiator */ return FALSE; if (!per_write_integer16(s, channelId, 0)) /* channelId */ return FALSE; if (!Stream_EnsureRemainingCapacity(s, 3)) return FALSE; Stream_Write_UINT8(s, 0x70); /* dataPriority + segmentation */ /* * We always encode length in two bytes, even though we could use * only one byte if length <= 0x7F. It is just easier that way, * because we can leave room for fixed-length header, store all * the data first and then store the header. */ length = (length - RDP_PACKET_HEADER_MAX_LENGTH) | 0x8000; Stream_Write_UINT16_BE(s, length); /* userData (OCTET_STRING) */ return TRUE; } static BOOL rdp_security_stream_out(rdpRdp* rdp, wStream* s, int length, UINT32 sec_flags, UINT32* pad) { BYTE* data; BOOL status; sec_flags |= rdp->sec_flags; *pad = 0; if (sec_flags != 0) { if (!rdp_write_security_header(s, sec_flags)) return FALSE; if (sec_flags & SEC_ENCRYPT) { BOOL res = FALSE; if (!security_lock(rdp)) return FALSE; if (rdp->settings->EncryptionMethods == ENCRYPTION_METHOD_FIPS) { data = Stream_Pointer(s) + 12; length = length - (data - Stream_Buffer(s)); Stream_Write_UINT16(s, 0x10); /* length */ Stream_Write_UINT8(s, 0x1); /* TSFIPS_VERSION 1*/ /* handle padding */ *pad = 8 - (length % 8); if (*pad == 8) *pad = 0; if (*pad) memset(data + length, 0, *pad); Stream_Write_UINT8(s, *pad); if (!security_hmac_signature(data, length, Stream_Pointer(s), rdp)) goto unlock; Stream_Seek(s, 8); if (!security_fips_encrypt(data, length + *pad, rdp)) goto unlock; } else { data = Stream_Pointer(s) + 8; length = length - (data - Stream_Buffer(s)); if (sec_flags & SEC_SECURE_CHECKSUM) status = security_salted_mac_signature(rdp, data, length, TRUE, Stream_Pointer(s)); else status = security_mac_signature(rdp, data, length, Stream_Pointer(s)); if (!status) goto unlock; Stream_Seek(s, 8); if (!security_encrypt(Stream_Pointer(s), length, rdp)) goto unlock; } res = TRUE; unlock: if (!security_unlock(rdp)) return FALSE; if (!res) return FALSE; } rdp->sec_flags = 0; } return TRUE; } static UINT32 rdp_get_sec_bytes(rdpRdp* rdp, UINT16 sec_flags) { UINT32 sec_bytes; if (rdp->sec_flags & SEC_ENCRYPT) { sec_bytes = 12; if (rdp->settings->EncryptionMethods == ENCRYPTION_METHOD_FIPS) sec_bytes += 4; } else if (rdp->sec_flags != 0 || sec_flags != 0) { sec_bytes = 4; } else { sec_bytes = 0; } return sec_bytes; } /** * Send an RDP packet. * @param rdp RDP module * @param s stream * @param channel_id channel id */ BOOL rdp_send(rdpRdp* rdp, wStream* s, UINT16 channel_id) { BOOL rc = FALSE; UINT32 pad; UINT16 length; if (!s) return FALSE; if (!rdp) goto fail; length = Stream_GetPosition(s); Stream_SetPosition(s, 0); if (!rdp_write_header(rdp, s, length, channel_id)) goto fail; if (!rdp_security_stream_out(rdp, s, length, 0, &pad)) goto fail; length += pad; Stream_SetPosition(s, length); Stream_SealLength(s); if (transport_write(rdp->transport, s) < 0) goto fail; rc = TRUE; fail: Stream_Release(s); return rc; } BOOL rdp_send_pdu(rdpRdp* rdp, wStream* s, UINT16 type, UINT16 channel_id) { UINT16 length; UINT32 sec_bytes; size_t sec_hold; UINT32 pad; if (!rdp || !s) return FALSE; length = Stream_GetPosition(s); Stream_SetPosition(s, 0); if (!rdp_write_header(rdp, s, length, MCS_GLOBAL_CHANNEL_ID)) return FALSE; sec_bytes = rdp_get_sec_bytes(rdp, 0); sec_hold = Stream_GetPosition(s); Stream_Seek(s, sec_bytes); if (!rdp_write_share_control_header(s, length - sec_bytes, type, channel_id)) return FALSE; Stream_SetPosition(s, sec_hold); if (!rdp_security_stream_out(rdp, s, length, 0, &pad)) return FALSE; length += pad; Stream_SetPosition(s, length); Stream_SealLength(s); if (transport_write(rdp->transport, s) < 0) return FALSE; return TRUE; } BOOL rdp_send_data_pdu(rdpRdp* rdp, wStream* s, BYTE type, UINT16 channel_id) { BOOL rc = FALSE; size_t length; UINT32 sec_bytes; size_t sec_hold; UINT32 pad; if (!s) return FALSE; if (!rdp) goto fail; length = Stream_GetPosition(s); Stream_SetPosition(s, 0); if (!rdp_write_header(rdp, s, length, MCS_GLOBAL_CHANNEL_ID)) goto fail; sec_bytes = rdp_get_sec_bytes(rdp, 0); sec_hold = Stream_GetPosition(s); Stream_Seek(s, sec_bytes); if (!rdp_write_share_control_header(s, length - sec_bytes, PDU_TYPE_DATA, channel_id)) goto fail; if (!rdp_write_share_data_header(s, length - sec_bytes, type, rdp->settings->ShareId)) goto fail; Stream_SetPosition(s, sec_hold); if (!rdp_security_stream_out(rdp, s, length, 0, &pad)) goto fail; length += pad; Stream_SetPosition(s, length); Stream_SealLength(s); WLog_DBG(TAG, "sending data (type=0x%x size=%" PRIuz " channelId=%" PRIu16 ")", type, Stream_Length(s), channel_id); rdp->outPackets++; if (transport_write(rdp->transport, s) < 0) goto fail; rc = TRUE; fail: Stream_Release(s); return rc; } BOOL rdp_send_message_channel_pdu(rdpRdp* rdp, wStream* s, UINT16 sec_flags) { BOOL rc = FALSE; UINT16 length; UINT32 pad; WINPR_ASSERT(rdp); WINPR_ASSERT(s); length = Stream_GetPosition(s); Stream_SetPosition(s, 0); if (!rdp_write_header(rdp, s, length, rdp->mcs->messageChannelId)) goto fail; if (!rdp_security_stream_out(rdp, s, length, sec_flags, &pad)) goto fail; length += pad; Stream_SetPosition(s, length); Stream_SealLength(s); if (transport_write(rdp->transport, s) < 0) goto fail; rc = TRUE; fail: Stream_Release(s); return rc; } static BOOL rdp_recv_server_shutdown_denied_pdu(rdpRdp* rdp, wStream* s) { return TRUE; } static BOOL rdp_recv_server_set_keyboard_indicators_pdu(rdpRdp* rdp, wStream* s) { UINT16 unitId; UINT16 ledFlags; WINPR_ASSERT(rdp); WINPR_ASSERT(s); rdpContext* context = rdp->context; WINPR_ASSERT(context); WINPR_ASSERT(context->update); if (!Stream_CheckAndLogRequiredLength(TAG, s, 4)) return FALSE; Stream_Read_UINT16(s, unitId); /* unitId (2 bytes) */ Stream_Read_UINT16(s, ledFlags); /* ledFlags (2 bytes) */ return IFCALLRESULT(TRUE, context->update->SetKeyboardIndicators, context, ledFlags); } static BOOL rdp_recv_server_set_keyboard_ime_status_pdu(rdpRdp* rdp, wStream* s) { UINT16 unitId; UINT32 imeState; UINT32 imeConvMode; if (!rdp || !rdp->input) return FALSE; if (!Stream_CheckAndLogRequiredLength(TAG, s, 10)) return FALSE; Stream_Read_UINT16(s, unitId); /* unitId (2 bytes) */ Stream_Read_UINT32(s, imeState); /* imeState (4 bytes) */ Stream_Read_UINT32(s, imeConvMode); /* imeConvMode (4 bytes) */ IFCALL(rdp->update->SetKeyboardImeStatus, rdp->context, unitId, imeState, imeConvMode); return TRUE; } static BOOL rdp_recv_set_error_info_data_pdu(rdpRdp* rdp, wStream* s) { UINT32 errorInfo; if (!Stream_CheckAndLogRequiredLength(TAG, s, 4)) return FALSE; Stream_Read_UINT32(s, errorInfo); /* errorInfo (4 bytes) */ return rdp_set_error_info(rdp, errorInfo); } static BOOL rdp_recv_server_auto_reconnect_status_pdu(rdpRdp* rdp, wStream* s) { UINT32 arcStatus; if (!Stream_CheckAndLogRequiredLength(TAG, s, 4)) return FALSE; Stream_Read_UINT32(s, arcStatus); /* arcStatus (4 bytes) */ WLog_WARN(TAG, "AutoReconnectStatus: 0x%08" PRIX32 "", arcStatus); return TRUE; } static BOOL rdp_recv_server_status_info_pdu(rdpRdp* rdp, wStream* s) { UINT32 statusCode; if (!Stream_CheckAndLogRequiredLength(TAG, s, 4)) return FALSE; Stream_Read_UINT32(s, statusCode); /* statusCode (4 bytes) */ if (rdp->update->ServerStatusInfo) return rdp->update->ServerStatusInfo(rdp->context, statusCode); return TRUE; } static BOOL rdp_recv_monitor_layout_pdu(rdpRdp* rdp, wStream* s) { UINT32 index; UINT32 monitorCount; MONITOR_DEF* monitor; MONITOR_DEF* monitorDefArray; BOOL ret = TRUE; if (!Stream_CheckAndLogRequiredLength(TAG, s, 4)) return FALSE; Stream_Read_UINT32(s, monitorCount); /* monitorCount (4 bytes) */ if (!Stream_CheckAndLogRequiredLengthOfSize(TAG, s, monitorCount, 20ull)) return FALSE; monitorDefArray = (MONITOR_DEF*)calloc(monitorCount, sizeof(MONITOR_DEF)); if (!monitorDefArray) return FALSE; for (monitor = monitorDefArray, index = 0; index < monitorCount; index++, monitor++) { Stream_Read_INT32(s, monitor->left); /* left (4 bytes) */ Stream_Read_INT32(s, monitor->top); /* top (4 bytes) */ Stream_Read_INT32(s, monitor->right); /* right (4 bytes) */ Stream_Read_INT32(s, monitor->bottom); /* bottom (4 bytes) */ Stream_Read_UINT32(s, monitor->flags); /* flags (4 bytes) */ } IFCALLRET(rdp->update->RemoteMonitors, ret, rdp->context, monitorCount, monitorDefArray); free(monitorDefArray); return ret; } state_run_t rdp_recv_data_pdu(rdpRdp* rdp, wStream* s) { BYTE type; wStream* cs; UINT16 length; UINT32 shareId; BYTE compressedType; UINT16 compressedLength; if (!rdp_read_share_data_header(s, &length, &type, &shareId, &compressedType, &compressedLength)) { WLog_ERR(TAG, "rdp_read_share_data_header() failed"); return STATE_RUN_FAILED; } cs = s; if (compressedType & PACKET_COMPRESSED) { UINT32 DstSize = 0; const BYTE* pDstData = NULL; UINT16 SrcSize = compressedLength - 18; if ((compressedLength < 18) || (!Stream_CheckAndLogRequiredLength(TAG, s, SrcSize))) { WLog_ERR(TAG, "bulk_decompress: not enough bytes for compressedLength %" PRIu16 "", compressedLength); return STATE_RUN_FAILED; } if (bulk_decompress(rdp->bulk, Stream_Pointer(s), SrcSize, &pDstData, &DstSize, compressedType)) { cs = transport_take_from_pool(rdp->transport, DstSize); if (!cs) { WLog_ERR(TAG, "Couldn't take stream from pool"); return STATE_RUN_FAILED; } Stream_SetPosition(cs, 0); Stream_Write(cs, pDstData, DstSize); Stream_SealLength(cs); Stream_SetPosition(cs, 0); } else { WLog_ERR(TAG, "bulk_decompress() failed"); return STATE_RUN_FAILED; } Stream_Seek(s, SrcSize); } WLog_DBG(TAG, "recv %s Data PDU (0x%02" PRIX8 "), length: %" PRIu16 "", data_pdu_type_to_string(type), type, length); switch (type) { case DATA_PDU_TYPE_UPDATE: if (!update_recv(rdp->update, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_UPDATE - update_recv() failed"); goto out_fail; } break; case DATA_PDU_TYPE_CONTROL: if (!rdp_recv_server_control_pdu(rdp, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_CONTROL - rdp_recv_server_control_pdu() failed"); goto out_fail; } break; case DATA_PDU_TYPE_POINTER: if (!update_recv_pointer(rdp->update, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_POINTER - update_recv_pointer() failed"); goto out_fail; } break; case DATA_PDU_TYPE_SYNCHRONIZE: if (!rdp_recv_server_synchronize_pdu(rdp, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_SYNCHRONIZE - rdp_recv_synchronize_pdu() failed"); goto out_fail; } break; case DATA_PDU_TYPE_PLAY_SOUND: if (!update_recv_play_sound(rdp->update, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_PLAY_SOUND - update_recv_play_sound() failed"); goto out_fail; } break; case DATA_PDU_TYPE_SHUTDOWN_DENIED: if (!rdp_recv_server_shutdown_denied_pdu(rdp, cs)) { WLog_ERR( TAG, "DATA_PDU_TYPE_SHUTDOWN_DENIED - rdp_recv_server_shutdown_denied_pdu() failed"); goto out_fail; } break; case DATA_PDU_TYPE_SAVE_SESSION_INFO: if (!rdp_recv_save_session_info(rdp, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_SAVE_SESSION_INFO - rdp_recv_save_session_info() failed"); goto out_fail; } break; case DATA_PDU_TYPE_FONT_MAP: if (!rdp_recv_font_map_pdu(rdp, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_FONT_MAP - rdp_recv_font_map_pdu() failed"); goto out_fail; } break; case DATA_PDU_TYPE_SET_KEYBOARD_INDICATORS: if (!rdp_recv_server_set_keyboard_indicators_pdu(rdp, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_SET_KEYBOARD_INDICATORS - " "rdp_recv_server_set_keyboard_indicators_pdu() failed"); goto out_fail; } break; case DATA_PDU_TYPE_SET_KEYBOARD_IME_STATUS: if (!rdp_recv_server_set_keyboard_ime_status_pdu(rdp, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_SET_KEYBOARD_IME_STATUS - " "rdp_recv_server_set_keyboard_ime_status_pdu() failed"); goto out_fail; } break; case DATA_PDU_TYPE_SET_ERROR_INFO: if (!rdp_recv_set_error_info_data_pdu(rdp, cs)) { WLog_ERR( TAG, "DATA_PDU_TYPE_SET_ERROR_INFO - rdp_recv_set_error_info_data_pdu() failed"); goto out_fail; } break; case DATA_PDU_TYPE_ARC_STATUS: if (!rdp_recv_server_auto_reconnect_status_pdu(rdp, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_ARC_STATUS - " "rdp_recv_server_auto_reconnect_status_pdu() failed"); goto out_fail; } break; case DATA_PDU_TYPE_STATUS_INFO: if (!rdp_recv_server_status_info_pdu(rdp, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_STATUS_INFO - rdp_recv_server_status_info_pdu() failed"); goto out_fail; } break; case DATA_PDU_TYPE_MONITOR_LAYOUT: if (!rdp_recv_monitor_layout_pdu(rdp, cs)) { WLog_ERR(TAG, "DATA_PDU_TYPE_MONITOR_LAYOUT - rdp_recv_monitor_layout_pdu() failed"); goto out_fail; } break; default: WLog_WARN(TAG, "[UNHANDLED] %s Data PDU (0x%02" PRIX8 "), length: %" PRIu16 "", data_pdu_type_to_string(type), type, length); break; } if (cs != s) Stream_Release(cs); return STATE_RUN_SUCCESS; out_fail: if (cs != s) Stream_Release(cs); return STATE_RUN_FAILED; } state_run_t rdp_recv_message_channel_pdu(rdpRdp* rdp, wStream* s, UINT16 securityFlags) { WINPR_ASSERT(rdp); WINPR_ASSERT(s); if (securityFlags & SEC_AUTODETECT_REQ) { /* Server Auto-Detect Request PDU */ return autodetect_recv_request_packet(rdp->autodetect, RDP_TRANSPORT_TCP, s); } if (securityFlags & SEC_AUTODETECT_RSP) { /* Client Auto-Detect Response PDU */ return autodetect_recv_response_packet(rdp->autodetect, RDP_TRANSPORT_TCP, s); } if (securityFlags & SEC_HEARTBEAT) { /* Heartbeat PDU */ return rdp_recv_heartbeat_packet(rdp, s); } if (securityFlags & SEC_TRANSPORT_REQ) { return multitransport_recv_request(rdp->multitransport, s); } if (securityFlags & SEC_TRANSPORT_RSP) { return multitransport_recv_response(rdp->multitransport, s); } if (securityFlags & SEC_LICENSE_PKT) { return license_recv(rdp->license, s); } if (securityFlags & SEC_LICENSE_ENCRYPT_CS) { return license_recv(rdp->license, s); } if (securityFlags & SEC_LICENSE_ENCRYPT_SC) { return license_recv(rdp->license, s); } return STATE_RUN_SUCCESS; } state_run_t rdp_recv_out_of_sequence_pdu(rdpRdp* rdp, wStream* s) { UINT16 type; UINT16 length; UINT16 channelId; if (!rdp_read_share_control_header(s, &length, NULL, &type, &channelId)) return STATE_RUN_FAILED; if (type == PDU_TYPE_DATA) { return rdp_recv_data_pdu(rdp, s); } else if (type == PDU_TYPE_SERVER_REDIRECTION) { return rdp_recv_enhanced_security_redirection_packet(rdp, s); } else if (type == PDU_TYPE_FLOW_RESPONSE || type == PDU_TYPE_FLOW_STOP || type == PDU_TYPE_FLOW_TEST) { return STATE_RUN_SUCCESS; } else { return STATE_RUN_FAILED; } } BOOL rdp_read_flow_control_pdu(wStream* s, UINT16* type, UINT16* channel_id) { /* * Read flow control PDU - documented in FlowPDU section in T.128 * http://www.itu.int/rec/T-REC-T.128-199802-S/en * The specification for the PDU has pad8bits listed BEFORE pduTypeFlow. * However, so far pad8bits has always been observed to arrive AFTER pduTypeFlow. * Switched the order of these two fields to match this observation. */ UINT8 pduType; WINPR_ASSERT(s); WINPR_ASSERT(type); WINPR_ASSERT(channel_id); if (!Stream_CheckAndLogRequiredLength(TAG, s, 6)) return FALSE; Stream_Read_UINT8(s, pduType); /* pduTypeFlow */ *type = pduType; Stream_Seek_UINT8(s); /* pad8bits */ Stream_Seek_UINT8(s); /* flowIdentifier */ Stream_Seek_UINT8(s); /* flowNumber */ Stream_Read_UINT16(s, *channel_id); /* pduSource */ return TRUE; } /** * Decrypt an RDP packet. * * @param rdp RDP module * @param s stream * @param pLength A pointer to the result variable, must not be NULL * @param securityFlags the security flags to apply * * @return \b TRUE for success, \b FALSE otherwise */ BOOL rdp_decrypt(rdpRdp* rdp, wStream* s, UINT16* pLength, UINT16 securityFlags) { BOOL res = FALSE; BYTE cmac[8] = { 0 }; BYTE wmac[8] = { 0 }; BOOL status = FALSE; INT32 length = 0; WINPR_ASSERT(rdp); WINPR_ASSERT(rdp->settings); WINPR_ASSERT(s); WINPR_ASSERT(pLength); if (!security_lock(rdp)) return FALSE; length = *pLength; if (rdp->settings->EncryptionMethods == ENCRYPTION_METHOD_NONE) return TRUE; if (rdp->settings->EncryptionMethods == ENCRYPTION_METHOD_FIPS) { UINT16 len; BYTE version, pad; BYTE* sig; INT64 padLength; if (!Stream_CheckAndLogRequiredLength(TAG, s, 12)) goto unlock; Stream_Read_UINT16(s, len); /* 0x10 */ Stream_Read_UINT8(s, version); /* 0x1 */ Stream_Read_UINT8(s, pad); sig = Stream_Pointer(s); Stream_Seek(s, 8); /* signature */ length -= 12; padLength = length - pad; if ((length <= 0) || (padLength <= 0) || (padLength > UINT16_MAX)) { WLog_ERR(TAG, "FATAL: invalid pad length %" PRId32, padLength); goto unlock; } if (!security_fips_decrypt(Stream_Pointer(s), length, rdp)) goto unlock; if (!security_fips_check_signature(Stream_Pointer(s), length - pad, sig, rdp)) goto unlock; Stream_SetLength(s, Stream_Length(s) - pad); *pLength = (UINT16)padLength; } else { if (!Stream_CheckAndLogRequiredLength(TAG, s, sizeof(wmac))) goto unlock; Stream_Read(s, wmac, sizeof(wmac)); length -= sizeof(wmac); if (length <= 0) { WLog_ERR(TAG, "FATAL: invalid length field"); goto unlock; } if (!security_decrypt(Stream_Pointer(s), length, rdp)) goto unlock; if (securityFlags & SEC_SECURE_CHECKSUM) status = security_salted_mac_signature(rdp, Stream_Pointer(s), length, FALSE, cmac); else status = security_mac_signature(rdp, Stream_Pointer(s), length, cmac); if (!status) goto unlock; if (memcmp(wmac, cmac, sizeof(wmac)) != 0) { WLog_ERR(TAG, "WARNING: invalid packet signature"); /* * Because Standard RDP Security is totally broken, * and cannot protect against MITM, don't treat signature * verification failure as critical. This at least enables * us to work with broken RDP clients and servers that * generate invalid signatures. */ // return FALSE; } *pLength = length; } res = TRUE; unlock: if (!security_unlock(rdp)) return FALSE; return res; } const char* pdu_type_to_str(UINT16 pduType, char* buffer, size_t length) { const char* str; switch (pduType) { case PDU_TYPE_DEMAND_ACTIVE: str = "PDU_TYPE_DEMAND_ACTIVE"; break; case PDU_TYPE_CONFIRM_ACTIVE: str = "PDU_TYPE_CONFIRM_ACTIVE"; break; case PDU_TYPE_DEACTIVATE_ALL: str = "PDU_TYPE_DEACTIVATE_ALL"; break; case PDU_TYPE_DATA: str = "PDU_TYPE_DATA"; break; case PDU_TYPE_SERVER_REDIRECTION: str = "PDU_TYPE_SERVER_REDIRECTION"; break; case PDU_TYPE_FLOW_TEST: str = "PDU_TYPE_FLOW_TEST"; break; case PDU_TYPE_FLOW_RESPONSE: str = "PDU_TYPE_FLOW_RESPONSE"; break; case PDU_TYPE_FLOW_STOP: str = "PDU_TYPE_FLOW_STOP"; break; default: str = "PRU_TYPE_UNKNOWN"; break; } winpr_str_append(str, buffer, length, ""); { char msg[32] = { 0 }; _snprintf(msg, sizeof(msg), "[0x%08" PRIx32 "]", pduType); winpr_str_append(msg, buffer, length, ""); } return buffer; } /** * Process an RDP packet. * @param rdp RDP module * @param s stream */ static state_run_t rdp_recv_tpkt_pdu(rdpRdp* rdp, wStream* s) { state_run_t rc = STATE_RUN_SUCCESS; UINT16 length; UINT16 pduType; UINT16 pduSource; UINT16 channelId = 0; UINT16 securityFlags = 0; freerdp* instance; WINPR_ASSERT(rdp); WINPR_ASSERT(rdp->context); WINPR_ASSERT(s); instance = rdp->context->instance; WINPR_ASSERT(instance); if (!rdp_read_header(rdp, s, &length, &channelId)) return STATE_RUN_FAILED; if (freerdp_shall_disconnect_context(rdp->context)) return STATE_RUN_SUCCESS; if (rdp->autodetect->bandwidthMeasureStarted) { rdp->autodetect->bandwidthMeasureByteCount += length; } if (rdp->settings->UseRdpSecurityLayer) { if (!rdp_read_security_header(s, &securityFlags, &length)) { WLog_ERR(TAG, "rdp_recv_tpkt_pdu: rdp_read_security_header() fail"); return STATE_RUN_FAILED; } if (securityFlags & (SEC_ENCRYPT | SEC_REDIRECTION_PKT)) { if (!rdp_decrypt(rdp, s, &length, securityFlags)) return STATE_RUN_FAILED; } if (securityFlags & SEC_REDIRECTION_PKT) { /* * [MS-RDPBCGR] 2.2.13.2.1 * - no share control header, nor the 2 byte pad */ Stream_Rewind(s, 2); rdp->inPackets++; rc = rdp_recv_enhanced_security_redirection_packet(rdp, s); goto out; } } if (channelId == MCS_GLOBAL_CHANNEL_ID) { while (Stream_GetRemainingLength(s) > 3) { wStream subbuffer; wStream* sub; size_t diff; UINT16 remain; if (!rdp_read_share_control_header(s, NULL, &remain, &pduType, &pduSource)) return STATE_RUN_FAILED; sub = Stream_StaticInit(&subbuffer, Stream_Pointer(s), remain); if (!Stream_SafeSeek(s, remain)) return STATE_RUN_FAILED; rdp->settings->PduSource = pduSource; rdp->inPackets++; switch (pduType) { case PDU_TYPE_DATA: rc = rdp_recv_data_pdu(rdp, sub); if (state_run_failed(rc)) return rc; break; case PDU_TYPE_DEACTIVATE_ALL: if (!rdp_recv_deactivate_all(rdp, sub)) { WLog_ERR(TAG, "rdp_recv_tpkt_pdu: rdp_recv_deactivate_all() fail"); return STATE_RUN_FAILED; } break; case PDU_TYPE_SERVER_REDIRECTION: return rdp_recv_enhanced_security_redirection_packet(rdp, sub); case PDU_TYPE_FLOW_RESPONSE: case PDU_TYPE_FLOW_STOP: case PDU_TYPE_FLOW_TEST: WLog_DBG(TAG, "flow message 0x%04" PRIX16 "", pduType); /* http://msdn.microsoft.com/en-us/library/cc240576.aspx */ if (!Stream_SafeSeek(sub, remain)) return STATE_RUN_FAILED; break; default: { char buffer[256] = { 0 }; WLog_ERR(TAG, "incorrect PDU type: %s", pdu_type_to_str(pduType, buffer, sizeof(buffer))); } break; } diff = Stream_GetRemainingLength(sub); if (diff > 0) { char buffer[256] = { 0 }; WLog_WARN(TAG, "pduType %s not properly parsed, %" PRIdz " bytes remaining unhandled. Skipping.", pdu_type_to_str(pduType, buffer, sizeof(buffer)), diff); } } } else if (rdp->mcs->messageChannelId && (channelId == rdp->mcs->messageChannelId)) { if (!rdp->settings->UseRdpSecurityLayer) if (!rdp_read_security_header(s, &securityFlags, NULL)) return STATE_RUN_FAILED; rdp->inPackets++; rc = rdp_recv_message_channel_pdu(rdp, s, securityFlags); } else { rdp->inPackets++; if (!freerdp_channel_process(instance, s, channelId, length)) return STATE_RUN_FAILED; } out: if (!tpkt_ensure_stream_consumed(s, length)) return STATE_RUN_FAILED; return rc; } static state_run_t rdp_recv_fastpath_pdu(rdpRdp* rdp, wStream* s) { UINT16 length; rdpFastPath* fastpath; fastpath = rdp->fastpath; if (!fastpath_read_header_rdp(fastpath, s, &length)) { WLog_ERR(TAG, "rdp_recv_fastpath_pdu: fastpath_read_header_rdp() fail"); return STATE_RUN_FAILED; } if ((length == 0) || (!Stream_CheckAndLogRequiredLength(TAG, s, length))) { WLog_ERR(TAG, "incorrect FastPath PDU header length %" PRIu16 "", length); return STATE_RUN_FAILED; } if (rdp->autodetect->bandwidthMeasureStarted) { rdp->autodetect->bandwidthMeasureByteCount += length; } if (!fastpath_decrypt(fastpath, s, &length)) return STATE_RUN_FAILED; return fastpath_recv_updates(rdp->fastpath, s); } static state_run_t rdp_recv_pdu(rdpRdp* rdp, wStream* s) { const int rc = tpkt_verify_header(s); if (rc > 0) return rdp_recv_tpkt_pdu(rdp, s); else if (rc == 0) return rdp_recv_fastpath_pdu(rdp, s); else return STATE_RUN_FAILED; } static state_run_t rdp_handle_sc_flags(rdpRdp* rdp, wStream* s, UINT32 flag, CONNECTION_STATE nextState) { const UINT32 mask = FINALIZE_SC_SYNCHRONIZE_PDU | FINALIZE_SC_CONTROL_COOPERATE_PDU | FINALIZE_SC_CONTROL_GRANTED_PDU | FINALIZE_SC_FONT_MAP_PDU; state_run_t status = rdp_recv_pdu(rdp, s); if (state_run_success(status)) { const UINT32 flags = rdp->finalize_sc_pdus & mask; if ((flags & flag) == flag) { if (!rdp_client_transition_to_state(rdp, nextState)) status = STATE_RUN_FAILED; else status = STATE_RUN_SUCCESS; } else { char flag_buffer[256] = { 0 }; char mask_buffer[256] = { 0 }; WLog_WARN(TAG, "[%s] unexpected server message, expected flag %s [have %s]", rdp_get_state_string(rdp), rdp_finalize_flags_to_str(flag, flag_buffer, sizeof(flag_buffer)), rdp_finalize_flags_to_str(flags, mask_buffer, sizeof(mask_buffer))); } } return status; } static state_run_t rdp_client_exchange_monitor_layout(rdpRdp* rdp, wStream* s) { WINPR_ASSERT(rdp); const UINT32 old = rdp->finalize_sc_pdus; state_run_t status = rdp_recv_pdu(rdp, s); /* This PDU is optional, so if we received a finalize PDU continue there */ if (state_run_success(status)) { const BOOL changed = old != rdp->finalize_sc_pdus; status = rdp_client_connect_finalize(rdp); if (changed && state_run_success(status)) status = STATE_RUN_TRY_AGAIN; } return status; } static state_run_t rdp_recv_callback_int(rdpTransport* transport, wStream* s, void* extra) { state_run_t status = STATE_RUN_SUCCESS; rdpRdp* rdp = (rdpRdp*)extra; WINPR_ASSERT(transport); WINPR_ASSERT(rdp); WINPR_ASSERT(s); switch (rdp_get_state(rdp)) { case CONNECTION_STATE_NEGO: if (!rdp_client_transition_to_state(rdp, CONNECTION_STATE_MCS_CREATE_REQUEST)) status = STATE_RUN_FAILED; else status = STATE_RUN_CONTINUE; break; case CONNECTION_STATE_NLA: if (nla_get_state(rdp->nla) < NLA_STATE_AUTH_INFO) { if (nla_recv_pdu(rdp->nla, s) < 1) { WLog_ERR(TAG, "%s - nla_recv_pdu() fail", rdp_get_state_string(rdp)); status = STATE_RUN_FAILED; } } else if (nla_get_state(rdp->nla) == NLA_STATE_POST_NEGO) { nego_recv(rdp->transport, s, (void*)rdp->nego); if (nego_get_state(rdp->nego) != NEGO_STATE_FINAL) { WLog_ERR(TAG, "%s - nego_recv() fail", rdp_get_state_string(rdp)); status = STATE_RUN_FAILED; } else if (!nla_set_state(rdp->nla, NLA_STATE_FINAL)) status = STATE_RUN_FAILED; } if (state_run_success(status)) { if (nla_get_state(rdp->nla) == NLA_STATE_AUTH_INFO) { transport_set_nla_mode(rdp->transport, FALSE); if (rdp->settings->VmConnectMode) { if (!nego_set_state(rdp->nego, NEGO_STATE_NLA)) status = STATE_RUN_FAILED; else if (!nego_set_requested_protocols(rdp->nego, PROTOCOL_HYBRID | PROTOCOL_SSL)) status = STATE_RUN_FAILED; else if (!nego_send_negotiation_request(rdp->nego)) status = STATE_RUN_FAILED; else if (!nla_set_state(rdp->nla, NLA_STATE_POST_NEGO)) status = STATE_RUN_FAILED; } else { if (!nla_set_state(rdp->nla, NLA_STATE_FINAL)) status = STATE_RUN_FAILED; } } } if (state_run_success(status)) { if (nla_get_state(rdp->nla) == NLA_STATE_FINAL) { if (!rdp_client_transition_to_state(rdp, CONNECTION_STATE_MCS_CREATE_REQUEST)) status = STATE_RUN_FAILED; else status = STATE_RUN_CONTINUE; } } break; case CONNECTION_STATE_MCS_CREATE_REQUEST: if (!mcs_client_begin(rdp->mcs)) { WLog_ERR(TAG, "%s - mcs_client_begin() fail", rdp_get_state_string(rdp)); status = STATE_RUN_FAILED; } else if (!rdp_client_transition_to_state(rdp, CONNECTION_STATE_MCS_CREATE_RESPONSE)) status = STATE_RUN_FAILED; else if (Stream_GetRemainingLength(s) > 0) status = STATE_RUN_CONTINUE; break; case CONNECTION_STATE_MCS_CREATE_RESPONSE: if (!mcs_recv_connect_response(rdp->mcs, s)) { WLog_ERR(TAG, "mcs_recv_connect_response failure"); status = STATE_RUN_FAILED; } else { if (!rdp_client_transition_to_state(rdp, CONNECTION_STATE_MCS_ERECT_DOMAIN)) status = STATE_RUN_FAILED; else if (!mcs_send_erect_domain_request(rdp->mcs)) { WLog_ERR(TAG, "mcs_send_erect_domain_request failure"); status = STATE_RUN_FAILED; } else if (!rdp_client_transition_to_state(rdp, CONNECTION_STATE_MCS_ATTACH_USER)) status = STATE_RUN_FAILED; else if (!mcs_send_attach_user_request(rdp->mcs)) { WLog_ERR(TAG, "mcs_send_attach_user_request failure"); status = STATE_RUN_FAILED; } else if (!rdp_client_transition_to_state(rdp, CONNECTION_STATE_MCS_ATTACH_USER_CONFIRM)) status = STATE_RUN_FAILED; } break; case CONNECTION_STATE_MCS_ATTACH_USER_CONFIRM: if (!mcs_recv_attach_user_confirm(rdp->mcs, s)) { WLog_ERR(TAG, "mcs_recv_attach_user_confirm failure"); status = STATE_RUN_FAILED; } else if (!freerdp_settings_get_bool(rdp->settings, FreeRDP_SupportSkipChannelJoin)) { if (!rdp_client_transition_to_state(rdp, CONNECTION_STATE_MCS_CHANNEL_JOIN_REQUEST)) status = STATE_RUN_FAILED; else if (!mcs_send_channel_join_request(rdp->mcs, rdp->mcs->userId)) { WLog_ERR(TAG, "mcs_send_channel_join_request failure"); status = STATE_RUN_FAILED; } else if (!rdp_client_transition_to_state( rdp, CONNECTION_STATE_MCS_CHANNEL_JOIN_RESPONSE)) status = STATE_RUN_FAILED; } else { /* SKIP_CHANNELJOIN is active, consider channels to be joined */ if (!rdp_client_skip_mcs_channel_join(rdp)) status = STATE_RUN_FAILED; } break; case CONNECTION_STATE_MCS_CHANNEL_JOIN_RESPONSE: if (!rdp_client_connect_mcs_channel_join_confirm(rdp, s)) { WLog_ERR(TAG, "%s - " "rdp_client_connect_mcs_channel_join_confirm() fail", rdp_get_state_string(rdp)); status = STATE_RUN_FAILED; } break; case CONNECTION_STATE_CONNECT_TIME_AUTO_DETECT_REQUEST: if (!rdp_client_connect_auto_detect(rdp, s)) { if (!rdp_client_transition_to_state(rdp, CONNECTION_STATE_LICENSING)) status = STATE_RUN_FAILED; else status = STATE_RUN_TRY_AGAIN; } break; case CONNECTION_STATE_LICENSING: status = rdp_client_connect_license(rdp, s); if (state_run_failed(status)) { char buffer[64] = { 0 }; WLog_DBG(TAG, "%s - rdp_client_connect_license() - %s", rdp_get_state_string(rdp), state_run_result_string(status, buffer, ARRAYSIZE(buffer))); } break; case CONNECTION_STATE_MULTITRANSPORT_BOOTSTRAPPING_REQUEST: if (!rdp_client_connect_auto_detect(rdp, s)) { rdp_client_transition_to_state( rdp, CONNECTION_STATE_CAPABILITIES_EXCHANGE_DEMAND_ACTIVE); status = STATE_RUN_TRY_AGAIN; } break; case CONNECTION_STATE_CAPABILITIES_EXCHANGE_DEMAND_ACTIVE: status = rdp_client_connect_demand_active(rdp, s); if (state_run_failed(status)) { char buffer[64] = { 0 }; WLog_DBG(TAG, "%s - " "rdp_client_connect_demand_active() - %s", rdp_get_state_string(rdp), state_run_result_string(status, buffer, ARRAYSIZE(buffer))); } else if (status != STATE_RUN_REDIRECT) { if (!rdp_client_transition_to_state( rdp, CONNECTION_STATE_CAPABILITIES_EXCHANGE_CONFIRM_ACTIVE)) status = STATE_RUN_FAILED; else status = STATE_RUN_CONTINUE; } break; case CONNECTION_STATE_CAPABILITIES_EXCHANGE_MONITOR_LAYOUT: status = rdp_client_exchange_monitor_layout(rdp, s); break; case CONNECTION_STATE_CAPABILITIES_EXCHANGE_CONFIRM_ACTIVE: status = rdp_client_connect_confirm_active(rdp, s); break; case CONNECTION_STATE_FINALIZATION_CLIENT_SYNC: status = rdp_handle_sc_flags(rdp, s, FINALIZE_SC_SYNCHRONIZE_PDU, CONNECTION_STATE_FINALIZATION_CLIENT_COOPERATE); break; case CONNECTION_STATE_FINALIZATION_CLIENT_COOPERATE: status = rdp_handle_sc_flags(rdp, s, FINALIZE_SC_CONTROL_COOPERATE_PDU, CONNECTION_STATE_FINALIZATION_CLIENT_GRANTED_CONTROL); break; case CONNECTION_STATE_FINALIZATION_CLIENT_GRANTED_CONTROL: status = rdp_handle_sc_flags(rdp, s, FINALIZE_SC_CONTROL_GRANTED_PDU, CONNECTION_STATE_FINALIZATION_CLIENT_FONT_MAP); break; case CONNECTION_STATE_FINALIZATION_CLIENT_FONT_MAP: status = rdp_handle_sc_flags(rdp, s, FINALIZE_SC_FONT_MAP_PDU, CONNECTION_STATE_ACTIVE); break; case CONNECTION_STATE_ACTIVE: status = rdp_recv_pdu(rdp, s); if (state_run_failed(status)) { char buffer[64] = { 0 }; WLog_DBG(TAG, "%s - rdp_recv_pdu() - %s", rdp_get_state_string(rdp), state_run_result_string(status, buffer, ARRAYSIZE(buffer))); } break; default: WLog_ERR(TAG, "%s state %d", rdp_get_state_string(rdp), rdp_get_state(rdp)); status = STATE_RUN_FAILED; break; } if (state_run_failed(status)) { char buffer[64] = { 0 }; WLog_ERR(TAG, "%s status %s", rdp_get_state_string(rdp), state_run_result_string(status, buffer, ARRAYSIZE(buffer))); } return status; } state_run_t rdp_recv_callback(rdpTransport* transport, wStream* s, void* extra) { char buffer[64] = { 0 }; state_run_t rc = STATE_RUN_FAILED; const size_t start = Stream_GetPosition(s); const rdpContext* context = transport_get_context(transport); WINPR_ASSERT(context); do { const rdpRdp* rdp = context->rdp; if (rc == STATE_RUN_TRY_AGAIN) Stream_SetPosition(s, start); const char* old = rdp_get_state_string(rdp); const size_t orem = Stream_GetRemainingLength(s); rc = rdp_recv_callback_int(transport, s, extra); const char* now = rdp_get_state_string(rdp); const size_t rem = Stream_GetRemainingLength(s); WLog_VRB(TAG, "(client)[%s -> %s] current return %s [feeding %" PRIuz " bytes, %" PRIuz " bytes not processed]", old, now, state_run_result_string(rc, buffer, sizeof(buffer)), orem, rem); } while ((rc == STATE_RUN_TRY_AGAIN) || (rc == STATE_RUN_CONTINUE)); return rc; } BOOL rdp_send_channel_data(rdpRdp* rdp, UINT16 channelId, const BYTE* data, size_t size) { return freerdp_channel_send(rdp, channelId, data, size); } BOOL rdp_channel_send_packet(rdpRdp* rdp, UINT16 channelId, size_t totalSize, UINT32 flags, const BYTE* data, size_t chunkSize) { return freerdp_channel_send_packet(rdp, channelId, totalSize, flags, data, chunkSize); } BOOL rdp_send_error_info(rdpRdp* rdp) { wStream* s; BOOL status; if (rdp->errorInfo == ERRINFO_SUCCESS) return TRUE; s = rdp_data_pdu_init(rdp); if (!s) return FALSE; Stream_Write_UINT32(s, rdp->errorInfo); /* error id (4 bytes) */ status = rdp_send_data_pdu(rdp, s, DATA_PDU_TYPE_SET_ERROR_INFO, 0); return status; } int rdp_check_fds(rdpRdp* rdp) { int status; rdpTsg* tsg; rdpTransport* transport; WINPR_ASSERT(rdp); transport = rdp->transport; tsg = transport_get_tsg(transport); if (tsg) { if (!tsg_check_event_handles(tsg)) { WLog_ERR(TAG, "rdp_check_fds: tsg_check_event_handles()"); return -1; } if (tsg_get_state(tsg) != TSG_STATE_PIPE_CREATED) return 1; } status = transport_check_fds(transport); if (status == 1) { if (!rdp_client_redirect(rdp)) /* session redirection */ return -1; } if (status < 0) WLog_DBG(TAG, "transport_check_fds() - %i", status); return status; } BOOL freerdp_get_stats(rdpRdp* rdp, UINT64* inBytes, UINT64* outBytes, UINT64* inPackets, UINT64* outPackets) { if (!rdp) return FALSE; if (inBytes) *inBytes = rdp->inBytes; if (outBytes) *outBytes = rdp->outBytes; if (inPackets) *inPackets = rdp->inPackets; if (outPackets) *outPackets = rdp->outPackets; return TRUE; } /** * Instantiate new RDP module. * @return new RDP module */ rdpRdp* rdp_new(rdpContext* context) { rdpRdp* rdp; DWORD flags = 0; DWORD remoteFlags = 0; rdp = (rdpRdp*)calloc(1, sizeof(rdpRdp)); if (!rdp) return NULL; InitializeCriticalSection(&rdp->critical); rdp->context = context; flags = 0; if (context->ServerMode) flags |= FREERDP_SETTINGS_SERVER_MODE; else remoteFlags |= FREERDP_SETTINGS_SERVER_MODE; if (!context->settings) { context->settings = rdp->settings = freerdp_settings_new(flags); if (!rdp->settings) goto fail; } else rdp->settings = context->settings; /* Keep a backup copy of settings for later comparisons */ if (!rdp_set_backup_settings(rdp)) return FALSE; rdp->settings->instance = context->instance; context->settings = rdp->settings; if (context->instance) context->settings->instance = context->instance; else if (context->peer) { rdp->settings->instance = context->peer; #if defined(WITH_FREERDP_DEPRECATED) context->peer->settings = rdp->settings; #endif } rdp->transport = transport_new(context); if (!rdp->transport) goto fail; { const rdpTransportIo* io = transport_get_io_callbacks(rdp->transport); if (!io) goto fail; rdp->io = calloc(1, sizeof(rdpTransportIo)); if (!rdp->io) goto fail; *rdp->io = *io; } rdp->license = license_new(rdp); if (!rdp->license) goto fail; rdp->input = input_new(rdp); if (!rdp->input) goto fail; rdp->update = update_new(rdp); if (!rdp->update) goto fail; rdp->fastpath = fastpath_new(rdp); if (!rdp->fastpath) goto fail; rdp->nego = nego_new(rdp->transport); if (!rdp->nego) goto fail; rdp->mcs = mcs_new(rdp->transport); if (!rdp->mcs) goto fail; rdp->redirection = redirection_new(); if (!rdp->redirection) goto fail; rdp->autodetect = autodetect_new(rdp->context); if (!rdp->autodetect) goto fail; rdp->heartbeat = heartbeat_new(); if (!rdp->heartbeat) goto fail; rdp->multitransport = multitransport_new(rdp, INITIATE_REQUEST_PROTOCOL_UDPFECL | INITIATE_REQUEST_PROTOCOL_UDPFECR); if (!rdp->multitransport) goto fail; rdp->bulk = bulk_new(context); if (!rdp->bulk) goto fail; rdp->pubSub = PubSub_New(TRUE); if (!rdp->pubSub) goto fail; rdp->abortEvent = CreateEvent(NULL, TRUE, FALSE, NULL); if (!rdp->abortEvent) goto fail; return rdp; fail: rdp_free(rdp); return NULL; } static void rdp_reset_free(rdpRdp* rdp) { WINPR_ASSERT(rdp); rdp_free_rc4_decrypt_keys(rdp); rdp_free_rc4_encrypt_keys(rdp); winpr_Cipher_Free(rdp->fips_encrypt); winpr_Cipher_Free(rdp->fips_decrypt); rdp->fips_encrypt = NULL; rdp->fips_decrypt = NULL; mcs_free(rdp->mcs); nego_free(rdp->nego); license_free(rdp->license); transport_free(rdp->transport); fastpath_free(rdp->fastpath); rdp->mcs = NULL; rdp->nego = NULL; rdp->license = NULL; rdp->transport = NULL; rdp->fastpath = NULL; } BOOL rdp_reset(rdpRdp* rdp) { BOOL rc = TRUE; rdpContext* context; rdpSettings* settings; WINPR_ASSERT(rdp); context = rdp->context; WINPR_ASSERT(context); settings = rdp->settings; WINPR_ASSERT(settings); bulk_reset(rdp->bulk); rdp_reset_free(rdp); if (!freerdp_settings_set_pointer_len(settings, FreeRDP_ServerRandom, NULL, 0)) rc = FALSE; if (!freerdp_settings_set_pointer_len(settings, FreeRDP_ServerCertificate, NULL, 0)) rc = FALSE; if (!freerdp_settings_set_string(settings, FreeRDP_ClientAddress, NULL)) rc = FALSE; if (!rc) goto fail; rc = FALSE; rdp->transport = transport_new(context); if (!rdp->transport) goto fail; if (rdp->io) { if (!transport_set_io_callbacks(rdp->transport, rdp->io)) goto fail; } rdp->nego = nego_new(rdp->transport); if (!rdp->nego) goto fail; rdp->mcs = mcs_new(rdp->transport); if (!rdp->mcs) goto fail; if (!transport_set_layer(rdp->transport, TRANSPORT_LAYER_TCP)) goto fail; rdp->license = license_new(rdp); if (!rdp->license) goto fail; rdp->fastpath = fastpath_new(rdp); if (!rdp->fastpath) goto fail; rdp->errorInfo = 0; rc = rdp_finalize_reset_flags(rdp, TRUE); fail: return rc; } /** * Free RDP module. * @param rdp RDP module to be freed */ void rdp_free(rdpRdp* rdp) { if (rdp) { DeleteCriticalSection(&rdp->critical); rdp_reset_free(rdp); freerdp_settings_free(rdp->settings); freerdp_settings_free(rdp->originalSettings); freerdp_settings_free(rdp->remoteSettings); input_free(rdp->input); update_free(rdp->update); nla_free(rdp->nla); redirection_free(rdp->redirection); autodetect_free(rdp->autodetect); heartbeat_free(rdp->heartbeat); multitransport_free(rdp->multitransport); bulk_free(rdp->bulk); free(rdp->io); PubSub_Free(rdp->pubSub); if (rdp->abortEvent) CloseHandle(rdp->abortEvent); free(rdp); } } BOOL rdp_io_callback_set_event(rdpRdp* rdp, BOOL set) { if (!rdp) return FALSE; return transport_io_callback_set_event(rdp->transport, set); } const rdpTransportIo* rdp_get_io_callbacks(rdpRdp* rdp) { if (!rdp) return NULL; return rdp->io; } BOOL rdp_set_io_callbacks(rdpRdp* rdp, const rdpTransportIo* io_callbacks) { if (!rdp) return FALSE; free(rdp->io); rdp->io = NULL; if (io_callbacks) { rdp->io = malloc(sizeof(rdpTransportIo)); if (!rdp->io) return FALSE; *rdp->io = *io_callbacks; return transport_set_io_callbacks(rdp->transport, rdp->io); } return TRUE; } BOOL rdp_set_io_callback_context(rdpRdp* rdp, void* usercontext) { WINPR_ASSERT(rdp); rdp->ioContext = usercontext; return TRUE; } void* rdp_get_io_callback_context(rdpRdp* rdp) { WINPR_ASSERT(rdp); return rdp->ioContext; } const char* rdp_finalize_flags_to_str(UINT32 flags, char* buffer, size_t size) { char number[32] = { 0 }; const UINT32 mask = ~(FINALIZE_SC_SYNCHRONIZE_PDU | FINALIZE_SC_CONTROL_COOPERATE_PDU | FINALIZE_SC_CONTROL_GRANTED_PDU | FINALIZE_SC_FONT_MAP_PDU | FINALIZE_CS_SYNCHRONIZE_PDU | FINALIZE_CS_CONTROL_COOPERATE_PDU | FINALIZE_CS_CONTROL_REQUEST_PDU | FINALIZE_CS_PERSISTENT_KEY_LIST_PDU | FINALIZE_CS_FONT_LIST_PDU | FINALIZE_DEACTIVATE_REACTIVATE); if (flags & FINALIZE_SC_SYNCHRONIZE_PDU) winpr_str_append("FINALIZE_SC_SYNCHRONIZE_PDU", buffer, size, "|"); if (flags & FINALIZE_SC_CONTROL_COOPERATE_PDU) winpr_str_append("FINALIZE_SC_CONTROL_COOPERATE_PDU", buffer, size, "|"); if (flags & FINALIZE_SC_CONTROL_GRANTED_PDU) winpr_str_append("FINALIZE_SC_CONTROL_GRANTED_PDU", buffer, size, "|"); if (flags & FINALIZE_SC_FONT_MAP_PDU) winpr_str_append("FINALIZE_SC_FONT_MAP_PDU", buffer, size, "|"); if (flags & FINALIZE_CS_SYNCHRONIZE_PDU) winpr_str_append("FINALIZE_CS_SYNCHRONIZE_PDU", buffer, size, "|"); if (flags & FINALIZE_CS_CONTROL_COOPERATE_PDU) winpr_str_append("FINALIZE_CS_CONTROL_COOPERATE_PDU", buffer, size, "|"); if (flags & FINALIZE_CS_CONTROL_REQUEST_PDU) winpr_str_append("FINALIZE_CS_CONTROL_REQUEST_PDU", buffer, size, "|"); if (flags & FINALIZE_CS_PERSISTENT_KEY_LIST_PDU) winpr_str_append("FINALIZE_CS_PERSISTENT_KEY_LIST_PDU", buffer, size, "|"); if (flags & FINALIZE_CS_FONT_LIST_PDU) winpr_str_append("FINALIZE_CS_FONT_LIST_PDU", buffer, size, "|"); if (flags & FINALIZE_DEACTIVATE_REACTIVATE) winpr_str_append("FINALIZE_DEACTIVATE_REACTIVATE", buffer, size, "|"); if (flags & mask) winpr_str_append("UNKNOWN_FLAG", buffer, size, "|"); if (flags == 0) winpr_str_append("NO_FLAG_SET", buffer, size, "|"); _snprintf(number, sizeof(number), " [0x%04" PRIx16 "]", flags); winpr_str_append(number, buffer, size, ""); return buffer; } BOOL rdp_finalize_reset_flags(rdpRdp* rdp, BOOL clearAll) { WINPR_ASSERT(rdp); WLog_DBG(TAG, "[%s] reset finalize_sc_pdus", rdp_get_state_string(rdp)); if (clearAll) rdp->finalize_sc_pdus = 0; else rdp->finalize_sc_pdus &= FINALIZE_DEACTIVATE_REACTIVATE; return TRUE; } BOOL rdp_finalize_set_flag(rdpRdp* rdp, UINT32 flag) { char buffer[1024] = { 0 }; WINPR_ASSERT(rdp); WLog_DBG(TAG, "[%s] received flag %s", rdp_get_state_string(rdp), rdp_finalize_flags_to_str(flag, buffer, sizeof(buffer))); rdp->finalize_sc_pdus |= flag; return TRUE; } BOOL rdp_finalize_is_flag_set(rdpRdp* rdp, UINT32 flag) { WINPR_ASSERT(rdp); return (rdp->finalize_sc_pdus & flag) == flag; } BOOL rdp_reset_rc4_encrypt_keys(rdpRdp* rdp) { WINPR_ASSERT(rdp); rdp_free_rc4_encrypt_keys(rdp); rdp->rc4_encrypt_key = winpr_RC4_New(rdp->encrypt_key, rdp->rc4_key_len); rdp->encrypt_use_count = 0; return rdp->rc4_encrypt_key != NULL; } void rdp_free_rc4_encrypt_keys(rdpRdp* rdp) { WINPR_ASSERT(rdp); winpr_RC4_Free(rdp->rc4_encrypt_key); rdp->rc4_encrypt_key = NULL; } void rdp_free_rc4_decrypt_keys(rdpRdp* rdp) { WINPR_ASSERT(rdp); winpr_RC4_Free(rdp->rc4_decrypt_key); rdp->rc4_decrypt_key = NULL; } BOOL rdp_reset_rc4_decrypt_keys(rdpRdp* rdp) { WINPR_ASSERT(rdp); rdp_free_rc4_decrypt_keys(rdp); rdp->rc4_decrypt_key = winpr_RC4_New(rdp->decrypt_key, rdp->rc4_key_len); rdp->decrypt_use_count = 0; return rdp->rc4_decrypt_key != NULL; } const char* rdp_security_flag_string(UINT32 securityFlags, char* buffer, size_t size) { if (securityFlags & SEC_EXCHANGE_PKT) winpr_str_append("SEC_EXCHANGE_PKT", buffer, size, "|"); if (securityFlags & SEC_TRANSPORT_REQ) winpr_str_append("SEC_TRANSPORT_REQ", buffer, size, "|"); if (securityFlags & SEC_TRANSPORT_RSP) winpr_str_append("SEC_TRANSPORT_RSP", buffer, size, "|"); if (securityFlags & SEC_ENCRYPT) winpr_str_append("SEC_ENCRYPT", buffer, size, "|"); if (securityFlags & SEC_RESET_SEQNO) winpr_str_append("SEC_RESET_SEQNO", buffer, size, "|"); if (securityFlags & SEC_IGNORE_SEQNO) winpr_str_append("SEC_IGNORE_SEQNO", buffer, size, "|"); if (securityFlags & SEC_INFO_PKT) winpr_str_append("SEC_INFO_PKT", buffer, size, "|"); if (securityFlags & SEC_LICENSE_PKT) winpr_str_append("SEC_LICENSE_PKT", buffer, size, "|"); if (securityFlags & SEC_LICENSE_ENCRYPT_CS) winpr_str_append("SEC_LICENSE_ENCRYPT_CS", buffer, size, "|"); if (securityFlags & SEC_LICENSE_ENCRYPT_SC) winpr_str_append("SEC_LICENSE_ENCRYPT_SC", buffer, size, "|"); if (securityFlags & SEC_REDIRECTION_PKT) winpr_str_append("SEC_REDIRECTION_PKT", buffer, size, "|"); if (securityFlags & SEC_SECURE_CHECKSUM) winpr_str_append("SEC_SECURE_CHECKSUM", buffer, size, "|"); if (securityFlags & SEC_AUTODETECT_REQ) winpr_str_append("SEC_AUTODETECT_REQ", buffer, size, "|"); if (securityFlags & SEC_AUTODETECT_RSP) winpr_str_append("SEC_AUTODETECT_RSP", buffer, size, "|"); if (securityFlags & SEC_HEARTBEAT) winpr_str_append("SEC_HEARTBEAT", buffer, size, "|"); if (securityFlags & SEC_FLAGSHI_VALID) winpr_str_append("SEC_FLAGSHI_VALID", buffer, size, "|"); { char msg[32] = { 0 }; _snprintf(msg, sizeof(msg), "[0x%08" PRIx32 "]", securityFlags); winpr_str_append(msg, buffer, size, ""); } return buffer; } static BOOL rdp_reset_remote_settings(rdpRdp* rdp) { UINT32 flags = 0; WINPR_ASSERT(rdp); freerdp_settings_free(rdp->remoteSettings); if (!freerdp_settings_get_bool(rdp->settings, FreeRDP_ServerMode)) flags |= FREERDP_SETTINGS_SERVER_MODE; rdp->remoteSettings = freerdp_settings_new(flags); return rdp->remoteSettings != NULL; } BOOL rdp_set_backup_settings(rdpRdp* rdp) { WINPR_ASSERT(rdp); freerdp_settings_free(rdp->originalSettings); rdp->originalSettings = freerdp_settings_clone(rdp->settings); if (!rdp->originalSettings) return FALSE; return rdp_reset_remote_settings(rdp); } BOOL rdp_reset_runtime_settings(rdpRdp* rdp) { WINPR_ASSERT(rdp); freerdp_settings_free(rdp->settings); rdp->context->settings = rdp->settings = freerdp_settings_clone(rdp->originalSettings); if (!rdp->settings) return FALSE; return rdp_reset_remote_settings(rdp); }